GEOTECHNOLOGIEN Rätselbild January 2004

What is shown here?

R tselbild January 2004 mineralgallery.com
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In the monthly GEOTECHNOLOGIEN puzzle image we present a section of a picture and leave it to your creativity or your knowledge to find out what is behind it ...

What's this? Algae on a pebble beach? Dirty snow in close-up? Barnacles on a ship's hull? Or something completely different?

The solution can be found here

(go.de, 21.01.2004 - NPO)

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